Bearing for throwing-wheels for pneumatic elevators.



Patented Nov. 7, 1899..

a. w. WILLIAMSON.

BEARING FOR THROWING WHEELS FOB PNEUMATIC ELEVATORS.

(Application filed Oct. 7, 1898.)

(N0 Model.)-

WITNESSES aw A rm E).

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UNITED STATES FFICE.

PATENT GEORGE WARREN WILLIAMSON, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE PNEUMATIC ELEVATOR AND WEIGHER COMPANY, OF SAME PLACE.

BEARING FOR THROWING-WHEELS FOR PNEUMATIC ELEVATORS.

SPECIFICATION forming part of Letters Patent N 0. 636,372, dated November '7, 1899.

Application filed October '7, 18 93- To all whom it may concern:

Be it known that I, GEORGE WARREN WIL- LIAMsON, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Bearings for Throwing-Wheels for Pneumatic Elevators, of which the following is a specification.

In that class of pneumatic elevators which, for example, are shown and described in Letters Patent of the United States No. 603,925, granted upon the application of James B. Schuman May 10, 1898, it has been difiicult to properly supportthe throwing-wheel or delivery-wheel,by which the material to heelevated is given its initial motion and delivered or thrown into the blast of air from the blastfan. The boots for such elevators where such throwing-wheels are used must be cut away centrally upon one side in order to admit the material to be elevated, thus rendering it impracticable to support an efficient bearing for the throwing-wheel shaft from that side and compelling such support from one side only. As the throwing-wheel performs a comparatively heavy work, the ordinary single bearing upon one side is inadequate to its requirements,and practical experience has demonstrated the insufiiciency of such a bearing.

The object of my invention is to provide an efficient bearing and support which may be attached to but one side of the boot and which when so attached will support the throwingwheel efficiently and steadily and will have sufficient length or bearing-surface for durable wear, and which shall also properly support the pulley which drives the throwingwheel. This object is attained by my improved construction and arrangement, and this will be first fully described, after which the novel features thereof will be pointed out in the claims.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar parts, Figure 1 is a side elevation of an elevator-boot wherein the throwing-wheel is provided with a bearing embodying my said invention; Fig. 2, a Vertical sectional View of the same as seen from the dotted line 2 2 in Serial No. 692,940. (No model.)

Fig. 3; and Fig. 3, a vertical sectional view of the same, on an enlarged scale, as seen from the dotted line 3 3 in Fig. 2.

The boot A is composed of two sides and suitable circular bands or edges,whereby substantially cylindrical chambers are formed, within which the throwing-wheel and the fan are placed, and from each of which chambers tangential openings lead and unite in a common neck, which forms the discharge-orifice to the boot. This construction, while in itself not a part of my present invention, constitutes a necessary part of my combination, as will be understood from the foregoing statement..

The blast-fan B is in itself similar in character to thatshown and described in the Schuman patent above referred to, although improved in form, and Will not therefore be further described herein.

The throwing-wheel C may be built of parts, as shown,or formed integrally, as desired. It is also similar in character to that shown in the Schuman patent except that it has a sleeve-like hub 1, which extends in to about midway thereof, where it is properly secured to the shaft 2, as by a set-screw 3 or by an ordinary spline. As will be observed, this brings the support for the throwing-wheel to a central position and counteracts any tendency to sidewise wear or twist on the bearings. Upon the opposite end of the shaft 2 is the pulley 4-, the hub 5 whereof is carried out to one side and is secured to astud-shaft by the set-screw 6 or by an ordinaryspline, as maybe desired. Thisarrangementissecured by curving the pulleyarms, as shown, and, as will be observed,permits the bearing to extend to or beyond the middle of the pulley, which prevents cramping or twisting of the shaft in the bearing under the stress of the pull of the belt on said pulley.

The bearing proper consists of a plate 7, which is secured by suitable bolts 8 to the side of the boot or wheel housing and which has tubular projections 9 and 10, one of which extends through the side of the boot or housing into the throwing-wheel receptacle and to within the sleeve-like hub of the throwingwheel and the other of which extends outwardly to preferably somewhat beyond the middle of the pulley and which together form a long bearing for the shaft 2, so that the single structure bearing 7 9 10 forms a complete support for the shaft, in which it runs freely and truly and without binding, while the ends of said projections abut against the inner sides of the sleeve 1 and the hub 5, and thus hold the shaft and the wheel and pulley carried thereby securely to proper position in the direction of the length of the shaft.

In order to efficiently lubricate this bearin g, a central annular space is formed therein in which is a ring 11, and a groove or tubular space 12 leads from this opening containing the ring up, through, or behind the plate 7 of the bearing to above the pulley, and through this groove or tubular space the lubricant may be introduced.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a pneumatic elevator, of the boot composed of two sides and circular bands or edges whereby a substantially cylindrical chamber is produced therein, one of said sides having a comparatively large centrally-positioned ingress-opening therein to admit the material to be elevated, and the otherside having a smaller opening to receive a bearing structure; said bearing structure composed of the central plate 7 and tubular projections 9 and 10 mounted in the opening provided therefor and secured to the side of the boot; a shaft mounted in said bearing; a throwingwheel having a sleeve like hub mounted on the inner end of said shaft, and a driving-pulley mounted on the outer end of said shaft, said several parts being arranged and operating substantially as shown and described.

2. The combination, in a pneumatic elevator, of the boot, a bearing structure secured to one side of the boot and having long sleevelike projections one of which extends through one side of the boot inwardly within the throwing-wheel receptacle, and the other of which extends in the opposite direction outwardly, said bearin ghavin g a centrally-positioned oilreceptacle with a tubular space leading therefrom upwardly and out through the portion of the bearing structure which is secured to the boot; a shaft mounted in said bearing; a throwin g-wheel having a sleeve-like hub surrounding the corresponding extension on the bearing structure and secured by its inner end to the inner end of said shaft, and a driving-pulley secured to the outer end of said shaft, substantially as shown and described.

3. The combination of the boot, a bearing structure secured to the side of said boot and having a long tubular central portion extending in both directions from its central plate, an annular space centrally located therein, a ring positioned in said annular space, and a groove or tubular space extending from said annular space to near the top of the central plate through which a lubricant can be introduced, a throwing-wheel having a sleevelike hub secured to the inner end of the shaft and a driving-pulleysecured to the outer end of the shaft, said several parts being constructed, arranged and operating substantially as shown and described.

In witness whereof I have hereunto set my hand and seal at Indianapolis, Indiana, this 28th day of September, A. D. 1898.

GEORGE WARREN WILLIAMSON. [It 8.]

W'itnesses:

CHESTER BRADFORD, JAMES A. WALSH. 

